Storage system and remote copy control method for storage system
US7945750B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 22, 2006 |
| Grant date | May 17, 2011 |
| Priority date | — |
| Expiry date | Jun 16, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2201/855
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A storage system of this invention maintains consistency of the stored contents between volumes even when a plurality of remote copying operations are executed asynchronously. A plurality of primary storage control devices and a plurality of secondary storage control devices are connected by a plurality of paths, and remote copying is performed asynchronously between respective first volumes and second volumes. Write data transferred from the primary storage control device to the secondary storage control device is held in a write data storage portion. Update order information, including write times and sequential numbers, is managed by update order information management portions. An update control portion collects update order information from each update order information management portion, determines the time at which update of each second volume is possible, and notifies each-update portion. By this means, the stored contents of each second volume can be updated up to the time at which update is possible.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.